It should be noted that deselecting Dynamic Updating Enabled turns off all dynamic updating, and also output cells containing dynamic objects already do not have Evaluatable selected, so there is nothing to turn off.
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Mr.Wizard♦Feb 22 '12 at 13:25

I did not mean anything contrary to what you said. Option for turning off evaluation of the cell can be helpful as well. The first does not deny the latter.
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ArtesFeb 22 '12 at 13:35

Usage:

When used with Dynamic[Refresh[DateString[], UpdateInterval -> 1]] Off works, but On does not. But evaluating the command restarts the code. Very nice, just what I was looking for.
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Ernst StelzerFeb 22 '12 at 16:13

@Ernst Please use with care, as I mentioned it doesn't appear to be very robust.
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SzabolcsFeb 22 '12 at 16:54

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